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Finding the Fourth Proportional to 261,487.21, 392,440.98 and 135,164.45

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Solution

The fourth proportional to 261,487.21, 392,440.98 and 135,164.45 is: 202,855.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,487.21 : 392,440.98 = 135,164.45 : x
  2. Step 2: Convert to fraction form
    261,487.21/392,440.98 = 135,164.45/x
  3. Step 3: Cross multiply
    261,487.21x = 392,440.98 × 135,164.45
  4. Step 4: Simplify right side
    261,487.21x = 53,044,068,543.34
  5. Step 5: Solve for x
    x = 53,044,068,543.34/261,487.21
  6. Step 6: Final answer
    x = 202,855.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.